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From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
To: <dev@dpdk.org>
CC: <pablo.de.lara.guarch@intel.com>, Jerin Jacob
<jerin.jacob@caviumnetworks.com>
Date: Mon, 2 May 2016 17:29:37 +0530
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Subject: [dpdk-dev] [PATCH] app/testpmd: add packet data prefetch in macswap
loop
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prefetch the next packet data address in advance in macswap loop
for performance improvement.
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
---
app/test-pmd/macswap.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/app/test-pmd/macswap.c b/app/test-pmd/macswap.c
index 154889d..c10f4b5 100644
--- a/app/test-pmd/macswap.c
+++ b/app/test-pmd/macswap.c
@@ -113,6 +113,9 @@ pkt_burst_mac_swap(struct fwd_stream *fs)
if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_INSERT_QINQ)
ol_flags |= PKT_TX_QINQ_PKT;
for (i = 0; i < nb_rx; i++) {
+ if (likely(i < nb_rx - 1))
+ rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
+ void *));
mb = pkts_burst[i];
eth_hdr = rte_pktmbuf_mtod(mb, struct ether_hdr *);
--
2.1.0